code: def test_rectangle():
      data = _random_grid(3, 5)
      p = ggplot(data, aes("x", "y", fill="g")) + geom_raster(
          interpolation="bilinear"
      )
      assert p == "rectangle"
  
file_path: plotnine/tests/test_geom_raster.py
imports: import numpy
  import pandas
  import pytest
  from plotnine import aes, geom_raster, ggplot
  from plotnine.exceptions import PlotnineWarning
label_desc: Use image node_id 3 for calling a global function with example usage: test_rectangle() without return types